Trinchesia cuanensis Korshunova et al, 2019

January 1998.
These lovely little animals can regularly be found on the old cable at South Gortein in Loch Fyne on the west coast. I have only ever seen them on this hydroid (Sertularella polyzonias?).

for more information about this species go to one of the links below
OPK - Opistobranquis

 nudibranchs of the british isles sea slug forum